Progressive Cavity Pumps
Progressive Cavity Pumps are able to pump at extremely low rates, even to high pressure.
Slurries can be pumped if the medium is viscous enough to maintain a lubricant layer around the particles in the liquid to protect the stator.
They can be used for pumping food & drink, oil, mining slurry, sewage & sludge, chemicals, grout or cement, fuels, etc.
These pump are often also known as “Helical Rotor”
They are also colloquially known as “Mono Pumps”, although “Mono” is a brand name, rather than a pump type.